Explosive-engine.



PATENTEIB NOV.

J. JENSEN; EXPLOSIVE ENGINE,

APPLICATION FILED MAR, 20, 1905.

(lamb 3. Jc QLsW/J 41 l W I of parts, as will be hereinafter de UNITED sTATas eigrnnr OFFICE JACOB FREDRIGK .JnNsEnor EVANSTON, ILLINOIS, ASSIGNOROF THREE roinrrns TO MARIE STILLMAN, or EVANSTQN, ILLINOIS;

EXPLOSlVE-ENGINE.

1'0 (1 1 6 whom it may concern.-

Be it known that I, {laces Fnsnmcn JEN- SEN, a citizen of the IJ'nitedState-s, residing at Evanston, in the county of Cool; and. State of Illinois, have invented certain new and useful Improvements in Explosive-Engines; and'I do declare the following to be a full, clear, and exact description of the invention, such. as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to iniprcverr'ients in ex losive-engines.

he ob 'ect of the invention is to provide an engine 0 this character havingtwcpistons within one cylinder driven by the same explosion, said pistons bein connected to a common crank-shaft, therdby increasing the force or i ower of the engine.

A fu'rt or object is to provide means whereby exhaust vapors will he forced out of the cylinder by a compression. or. air before the explosive mixture enters the same, thereby preventing back firing and increasing the force or pow er of the engine.

with these an othe .b iects in view invention consis .rtaio. novel of construction, cotinbina on, and "igeinent rribcd and claimed.

In the accompanying drawings; Figure 1: is

' a'vertical sectional view of? the engine, taken on a line with the cran.l -sl1ait, showing the pistons at the limit of their outer stroke. Fi 2 is a similar view taken at right angles to ig. l and showing the iistons at the limit of their inner stroke; and Fig. 3 is a detail cross-sectional View through one end oi the crank-shaft,showing the arrangwieut oi the s arki'ng mechanism and the mania in which the same is operated by the crank-shalt Referring more particularly to the drawings, 1 denotes a cylinder around which and spaced therefrom is a water-jacket 2. In the 11 per end of the cylinder is arranged an upptr piston 8, the piston-rod 4. of which passes through a smiling-box 5, arranged on the up-- per head of the cylinder. The upper end of the piston-rod is adapted to slide through a guide-plate 6, which is secured to the upper end of a guide-frame 7, mounted on the upper end ofthe cylinder, as shown. (,onncctcd t0 the piston-rod 4; a cross hcad 8, to the ends of which are secured c nnecting-rods 9, the opposite or lower ends of which are pivotally Specification of Letters Patent.

Application filed March 20, 1905. Serial No. 251,090.

port 23, havin Patentea'irov'. 13,1906.

connected to cranks 10, formed on a, crank drive-shaft 12, which is journaled in suitable bearings 13 at the lower end of the piston. In one side of the cylinder, adjacent to the upper end of the same, is arranged an inlet-port 14-, having an. inlet-valve 15. On the opposite side of the piston. and (prefgrabllly in line with,

a isc arge-port .16,

the port 14: is arrange which is connected with a tube 17, arranged on the outer side of the cylinder, as shown.

The opposite end of said tube is connected with an inlet-port 18, formed in the cylinder some distance below then per .end of. the same. In the lower endoft e cylinder is at:- ranged a piston 19, the connecting-rodfiO of which is connected with a crank 21-,.-.formed on the drivin' -shaft 12 between the cranks 10. The cran 21 is disposed within acii sing 2.2-, which practically forms a continuation of be lower end. 01": thecylinder. end of the casing 2-2 is formed an air-inlet arranged therein an inletvalve 24.- In t. ceasing 22, adjacent, to the lower end of the cylinder, is formed an airdischarge port .25 which is connected with a tube 26, arranged on the side of the cylinderand opening into the same at its upper end a short distance below the inlet-portlS, as shown.

In one side 05 the cylinder, adjacent to the lower end thereof, is formed an exhaust port 22,? for the discharge of the exhaust of vapors from said c' linder. Above said port and substantially midway between thc ends of- .the cylinder is arranged a-sparking plug 28,

tlwmigh-which passes the electric contactpoints the explosive mixture the proper time.

In order to complete the electric circuit within the cylinder at,

and cause the sparkin mechanism to ignite" the explosive lluicl at t .10 proper time, a suitable make-and-brealg d e'vic'e is provided, said device preferably consisting 0' a spring arm or blade 29, which is mounted in a suitable casing 30, arranged on one end of the cranked drive-shaft l2. Said arm or blade has arranged thereon a platinum point and is connected. with one wire of the electric sparking circuits. In the casing 60in arranged a screw 31, on the inner end of which is formed a coritact-point adapted to be engaged by the platinum point of the spring arm or blade=29. 31 is conmac'ted to the opposite The screw by which a spark is'formed to ignite.

Inthe lower point on the end of the same may be adjusted away from each other,

wire of the sparking circuit, so that when the formed at the oppositeends of said circuit-- wire. By means of the screw 31 the contactto bring the same into proper working position with respect to the spring-arm 29. In order that the spring arm or blade 29 may be brought into enga ement with the point on the screw 31 at t e pro er time, the. camshaped disk 32 is secured on the end of the drive-shaft 12 adjacent to the arm 29, said cambeing so arranged on said shaft that it will be turned into engagement thereby with the arm 29 to bring the platinum point on the same into engagement with the contact-point on the screw 31 at the moment the pistons 3 and 19 have reached the limit of their inner strokes, thus igniting the explosive fluid which has been compressed between said pisjtons'on their inner strokes, causing an explosion which drives the pistons outwardly or On the crank-shaft is mounted the usual fi -wheel 33. The water-jacket around the cylinder is provided with suitable inlet and outlet passages 34'and 35, whereby a circulation of water may be provided for within the jacket 2. i

'In operation, assuming the pistons to be at the limit of their outer strokes, as shown in i Fig. 1, they will be brought together on their inner stroke by the momentum or inertia of the flywheel 23, and in coming together on their inner strokes the explosive mixture ,within the cylinder will be compressed be tween said pistons. The inward movement of the lower piston creates a suction in the casing 22, which draws air into port 23 and valve 24, which when'thepiston 1s moved outwardly on its outlet'stroke it compresses the air in casing 22, forcingthe same into the discharge-port 25 and throu h the tube 26 into the cylinder, thus forcing the exhausted vapor therefrom through the exhaust-port 27.

draws gas and air into the cylinder through the gas and air inlet valve 15 and port 14, while the inward movement of the iston 19 creates a suction to draw air throug the airforming an explosive fluid which as will be understood.

the; air-inlet" The inward movement ofthe upper piston creates the suction which be forced thereby pistons are brought together is compressed,

and when the pistons reach the limit of their inner movement the explosive mixture compressed by the inward movement of the same 1s ignited, causing an explosion which again drives the pistons outwardly. Thus the opera- .tion asherein described is repeated.

From the fore oing description, taken in connection with t e accompanying drawings, the construction and operation of the inven-, tion will be readily understood without'requiring a more extended explanation.

Various changes in the form, proportion,

and the minor details of construction may be resorted to without departing from the prin ciple or sacrificing any of the advantages of this invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an explosive-engine, the combination with the cylinder forming a compression and explosion chamber, of opposing pistons working in said cylinder, a crank-shaft having oppositely-disposed cranks, a direct con-. nection between said crank-shaft and one of said pistons, a cross-head connected to the piston-rod .of the other piston, connecting rods connecting said cross-head with the oppositely-disposed crank'sof said crank-shaft, a casing arranged on one end of said cylinder to form an air-suction chamber, a passage leading from said chamber and openm into said cylinder between the pistons, a c eckvalve whereby as and air is drawn into the 0 posite ends of said cylinder and forced into t e center of the same for forcing out the air previously introduced therein, an exhaustport in the cylinders, and an automaticallyoperated sparking device to i nite said gas and air, substantially as descrihed.

2. In an explosive-engine, the combination with the cylinder forming a compression and explosion chamber, of opposing pistons working in said cylinder, a crank-shaft having oppositely-disposed cranks, a direct connection between said crankshaft and one of said pistons, a cross-head connected to the piston-rod of the other piston, connectingrods connecting said cross-head with the 0 positely-disposed cranks of said crankshaht, a casing arranged on one end of said cylinder to form an air-suction chamber, a passage leading from said chamber and opening into said cylinder between the pistons, a checkvalve whereby as and air is drawn into the opposite end 0 the cylinder, an electrical sparking mechanism actuated by the cranks aft to ignit said gas and air at the limit of the inner strokes of said istons, and an exhaust-port in said cylind dr whereb the ex-- hausted vapor is discharged from t c cylinder, substantiall as described.

' 3. In an exp osive-engine, the combination with a cylinder having a water-jacket,

said jacket having inlet and outlet two opposing pistons arranged in said cylinder, a crank-shaft, a centrally-disposed crank formed on said shaft, a direct connection between said central crank and one of said pistons, side cranksformedon said shaft and projecting in an opposite direction to said central crank, -a piston-rod connected tothe other piston, a guide-frame to receive said rod, a cross-head connected to the latterconnecting-rods connectin said cross-bee with the side cranks on 'sai' shaft, an air-suction chamber arranged on the'lower end of said cylinder, a check-valve communicating with said chamber air inlet and discharge ports formed in said cylinder, means whereby ports, of I proper time, substantiall as d ducted from said end and discharged into. the 29 center of the cylinder forcing out the yiously introduced therein, and an automated ically-opefated, electrical spar Nmecham; ism adapted to ignite said gas an ,air afigth'e escribedii 25 In test ony whereo 'hayehereunto. set my hand in'presence of two subscribing nesses. .i a

ACOB FREDRICK JENSEN-Ii" Witnesses:- J. E Mums,

FRED .J. Knrnnn. 

